Jesus referred to Peter as Petros meaning small stone, and then Jesus stated, upon this rock meaning Petra , which is a massive rock, will I build my church . In other words, Christ was not making Peter the foundation because to do so will be detrimental to the kingdom, because of man s instability. However, when Peter stated that Thou art the Christ Jesus rewarded him by stating that he is Peter which is a small rock connecting all those whom he come in contact with to the rock Petra , which is a massive rock which is Christ himself. For Christ is the foundation according to 1 Corinthians 3 11. This connection will be done through Peter s testimony of Jesus being the Christ. So, therefore for I believe Jesus was letting Peter know that he will build his church upon the testimony of Peter which states, thou art the Christ . When we all have Peter s testimony that Jesus is the Christ, we will also become Petros a small stone adding to the church, for every saint is a stone according to 1 Peter 2 5 .